Wow, wish I had that kind of social life ...
OP: I don't know what Sword and Shield sold did in that same time, but I'd guess around that, if not a little higher.
"This quarter" means March - May right?
The sales will be from the 20th to the 31st of March so that will be 11 days. The sales data will be revealed at the end of April. I'm thinking 2.75m Japan and 7.5m WW, also AC is like Mario Kart because it sells for years after it's initial release so i think 20m plus lifetime is likely.